Start with Pale Wisteria, a soft lavender-gray that sets a calm, slightly dreamy mood across the biggest surfaces. It has just enough purple to feel special and enough gray to stay easy to live with, so it never tips into sugary. Pairing it with a cool blue is a natural move, because both colors share that quiet, hazy softness and seem to breathe together rather than compete.
Bring in Powder Blue on the trim to keep everything light and fresh, like a clear morning sky behind the lavender walls. Then let Slate Violet do the heavy lifting as your accent, a deeper, dustier violet that anchors the scheme and gives your eye somewhere to land. Use it on a door, a piece of furniture, or built-ins to add depth. This trio stays soft and flexible, so it can flow through a living room, a restful bedroom, a bright kitchen, or carry gently across a whole home.